Eink play video issue

hello， our product parameter as blew: chip : imx6sl sw system : android 4.4.0 screen : Eink resolution is 1872X1404 I try to change system update display mode, set WAVEFORM_MODE_ANIM and EPDC_FLAG_USE_DITHERING_Y1 when play a video.but the effect is no good. please check the effect video in attachment.